Linux ulimit Command Detailed

Ulimit is a computer command used by the shell to start a process that consumes resources that can be used to modify system resource limits

Command Common parameters

-H sets the hard resource limit.-S sets the soft resource limit.-A displays all current resource limits.-C Size: Sets the maximum value of the core file. Unit: Blocks-d Size: Sets the maximum value for the data segment. Units: Kbytes-f Size: Sets the maximum value of the file created. Blocks-l Size: Sets the maximum value of the locked process in memory. Unit: Kbytes-m Size: Sets the maximum number of resident memory that can be used. Unit: Kbytes-n Size: Sets the maximum value of the file descriptor that the kernel can open at the same time. Unit: N-p Size: Sets the maximum value of the pipe buffer. Unit: Kbytes-s Size: Sets the maximum value for the stack. Unit: Kbytes-t Size: Sets the maximum limit for CPU usage. Unit: Seconds-v Size: Sets the maximum value of virtual memory. Unit: Kbytes-u Number of < programs > number of programs the user can open

Common Command Display

1. View the maximum identifiers

2. Adjust file descriptors

Ulimit-shn 65535  temporarily modified  s:soft limit  h:hard limit

3. Recommended control file Descriptor size ==>

Change:   <domain>   <type>   <item>   <value>echo '  *           -      nofile    65535 ' >>/etc/security/limits.conf changes after viewing: Tail-1/etc/security/limits.conf  

Linux ulimit Command Detailed